patch 8.1.1102: Win32 exe file contains unused code

Problem:    Win32 exe file contains unused code.
Solution:   Remove unused #ifdefs and code. (Ken Takata, closes #4198)

src/os_w32exe.c

@@ -10,7 +10,8 @@
 /*
  * Windows GUI: main program (EXE) entry point:
  *
- * Ron Aaron <ronaharon@yahoo.com> wrote this and the DLL support code.
+ * Ron Aaron <ronaharon@yahoo.com> wrote this and the (now deleted) DLL support
+ * code.
  */
 #include "vim.h"
 
@@ -20,54 +21,27 @@
 # endif
 #endif
 
-/* cproto doesn't create a prototype for main() */
+// cproto doesn't create a prototype for VimMain()
-int _cdecl
+int _cdecl VimMain(int argc, char **argv);
-#if defined(FEAT_GUI_MSWIN)
-VimMain
-#else
-    main
-#endif
-	(int argc, char **argv);
-static int (_cdecl *pmain)(int, char **);
-
-#ifndef PROTO
 #ifdef FEAT_GUI
 void _cdecl SaveInst(HINSTANCE hInst);
-static void (_cdecl *pSaveInst)(HINSTANCE);
 #endif
 
+#ifndef PROTO
     int WINAPI
 WinMain(
-    HINSTANCE	hInstance UNUSED,
+    HINSTANCE	hInstance,
     HINSTANCE	hPrevInst UNUSED,
     LPSTR	lpszCmdLine UNUSED,
     int		nCmdShow UNUSED)
 {
     int		argc = 0;
     char	**argv = NULL;
-#ifdef FEAT_GUI
-    pSaveInst = SaveInst;
-#endif
-    pmain =
-#if defined(FEAT_GUI_MSWIN)
-    //&& defined(__MINGW32__)
-	VimMain
-#else
-	main
-#endif
-	;
-#ifdef FEAT_GUI
-    pSaveInst(
-#ifdef __MINGW32__
-	    GetModuleHandle(NULL)
-#else
-	    hInstance
-#endif
-	    );
-#endif
-    pmain(argc, argv);
 
-    free_cmd_argsW();
+# ifdef FEAT_GUI
+    SaveInst(hInstance);
+# endif
+    VimMain(argc, argv);
 
     return 0;
 }

src/version.c

@@ -771,6 +771,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1102,
 /**/
     1101,
 /**/